The Mistake of the Machine

"The Mistake of the Machine" is a short story by G.K. Chesterton featuring his detective character Father Brown, where a seemingly perfect, automated system within a large factory malfunctions, leading to a mysterious death, and Father Brown, through his keen observation skills and understanding of human nature, uncovers the truth behind the "mistake" by identifying a hidden motive and the human element involved in the machine's supposed error.